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Protagonist Therapeutics

Most recent annual filing: 2026-02-25

Catalyst timeline

14 trackedQuarter catalyst calendar →
  1. Zasocitinib Takeda filing2026Zasocitinib Takeda filing, 2026, notable
  2. MIMRYLO/ICOTYDE commercial launch3Q 2026MIMRYLO/ICOTYDE commercial launch, 3Q 2026, notable
  3. DISC-3405 Disc Medicine Ph2 interim3Q 2026DISC-3405 Disc Medicine Ph2 interim, 3Q 2026, notable
  4. PTGX buyback corporate updateBy year-end 2026PTGX buyback corporate update, By year-end 2026, routine
  5. Takeda/J&J milestone payments FDA decision4Q 2026Takeda/J&J milestone payments FDA decision, 4Q 2026, material
  6. PN-881 Ph2b startearly 1Q 2027PN-881 Ph2b start, early 1Q 2027, notable
  7. PN-8047 Ph1 start1Q 2027PN-8047 Ph1 start, 1Q 2027, notable
  8. PN-477 Ph1 start1H 2027PN-477 Ph1 start, 1H 2027, notable
  9. Divesiran Silence Therapeutics Ph3 readout1H 2027Divesiran Silence Therapeutics Ph3 readout, 1H 2027, notable
  10. ICOTYDE readoutFeb 2027 – Sep 2028ICOTYDE readout, Feb 2027 – Sep 2028, material
  11. PN-8047 Ph1 interimMid-2027PN-8047 Ph1 interim, Mid-2027, material
  12. PN-477/PN-8047/PN-458 Ph2 readout2H 2027PN-477/PN-8047/PN-458 Ph2 readout, 2H 2027, material
  13. PN-881 readout2H 2027PN-881 readout, 2H 2027, material
  14. PN-881 Ph2 topline1H 2028PN-881 Ph2 topline, 1H 2028, major

Bar width shows how precise the guidance is — a pin is a stated date, a wide band a six-month window. Deeper blue means more of the thesis rides on the event; it is not a view on the stock.

Pipeline (11 active programs)

PN-477sc

Technology platforms

Protagonist Peptide Platform

Proprietary constrained peptide discovery platform leveraging phage display, medicinal chemistry, structural biology, oral stability techniques, and in vivo pharmacology to develop oral and injectable peptide therapeutics. Applied across inflammation/immunology (IL-23R, IL-17), hematology (hepcidin mimetics), and metabolic diseases (incretin receptor agonists). Also enables small molecule discovery for targets requiring high oral bioavailability.

Targets: IL-23R, IL-17, hepcidin, GLP-1R, GIPR, GCGR

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